status-go/vendor/github.com/ethereum/go-ethereum/ethdb/interface.go

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// Copyright 2014 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package ethdb
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// Code using batches should try to add this much data to the batch.
// The value was determined empirically.
const IdealBatchSize = 100 * 1024
// Putter wraps the database write operation supported by both batches and regular databases.
type Putter interface {
Put(key []byte, value []byte) error
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}
// Database wraps all database operations. All methods are safe for concurrent use.
type Database interface {
Putter
Get(key []byte) ([]byte, error)
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Has(key []byte) (bool, error)
Delete(key []byte) error
Close()
NewBatch() Batch
}
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// Batch is a write-only database that commits changes to its host database
// when Write is called. Batch cannot be used concurrently.
type Batch interface {
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Putter
ValueSize() int // amount of data in the batch
Write() error
// Reset resets the batch for reuse
Reset()
}